Checking fixture for machining engine cylinder cover

Abstract

The utility model relates to a testing fixture for processing an engine cylinder cover, which comprises a base, a dial indicator, a vertical frame and a three-axis linear guide rail, the front end and the rear end of the base are both provided with a lifting mechanism for lifting when the engine cylinder cover is detected, and the lifting mechanism is provided with a positioning mechanism for positioning when the engine cylinder cover is detected. The positioning mechanism comprises a fixing assembly, a frame body arranged on the top of the lifting mechanism and sliding rods located on the two sides in the frame body in a sliding mode. The problems that in a production line, a worker needs to detect a large number of engine cylinder covers, due to the fact that a detection device and a conveying belt for conveying the engine cylinder bodies are not located on the same production line in the scheme, the engine cylinder covers on the conveying belt need to be carried to a workbench of the detection device to be detected, and the detection efficiency is high are solved. And the engine cylinder cover needs to be moved away after detection is finished, so that the production efficiency is reduced when a large batch of engine cylinder covers need to be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cylinder head production, and specifically relates to a fixture for machining engine cylinder heads. Background Art

[0002] The dimensional parameters of the engine cylinder head are important dimensional parameters for the machining of the engine cylinder head, which directly affect the service performance of the engine. In order to ensure the product qualification rate, fixtures need to be equipped on the engine cylinder block and cylinder head production line, and currently, they are mostly detected by a coordinate measuring machine;

[0003] Upon inquiry, the publication (announcement) number: CN210570341U discloses, and in this technology, "a fixture for machining engine cylinder heads is disclosed, including a device main body. At the four corners of the bottom end of the device main body, support feet are fixedly installed. On one side of the top end of the device main body, a workbench is fixedly installed. On one side of the top end of the device main body close to the workbench, a lifting mechanism is fixedly installed. On one side of the outer wall of the lifting mechanism, a sliding seat is arranged. At least one set of sliding grooves is opened on one side of the lifting mechanism corresponding to the sliding seat. In the middle of the top end of the sliding seat, a dial indicator is fixedly installed" and other technical solutions, having technical effects such as "enabling the overall device to perform machining on the cylinder block and cylinder head production line more quickly and conveniently, and effectively improving the work efficiency of the user";

[0004] In the production line, workers need to detect a large number of engine cylinder heads. Since the detection device in the above solution is not on the same production line as the conveyor belt for transporting the engine cylinder block, this leads to the need to move the engine cylinder head on the conveyor belt to the workbench of the detection device for detection, and it also needs to be moved away after the detection is completed, resulting in a significant reduction in production efficiency when detecting a large number of engine cylinder heads. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a fixture for machining engine cylinder heads, which has the characteristics that the engine cylinder block can be directly detected on the production line during the conveying process, and by holding and fixing the engine cylinder head and then lifting it off the conveyor belt, it can avoid shaking and causing errors in subsequent detection, thereby affecting the detection accuracy.

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: A fixture for machining engine cylinder heads includes a base, a micrometer, a vertical frame, and a three-axis linear guide rail. Lifting mechanisms for lifting during the detection of the engine cylinder head are arranged at both the front and the rear ends on the base. A positioning mechanism for positioning during the detection of the engine cylinder head is arranged on the lifting mechanism. The positioning mechanism includes:

[0007] Fixing components, a frame body arranged at the top of the lifting mechanism, sliding rods slidably installed on both sides inside the frame body, and positioning heads fixedly installed at the ends of the sliding rods and used for fixing the engine cylinder head;

[0008] Driving components, double-sided inclined blocks arranged inside the sliding rods of the frame body and used for driving the sliding rods, a second connecting rod arranged inside the frame body and used for synchronously driving the double-sided inclined blocks on both sides, and a first air cylinder installed at one end of the frame body and used for driving the second connecting rod.

[0009] Preferably, the lifting mechanism includes:

[0010] Fixed seats fixed at the front and rear ends of the base, with a bracket arranged above the fixed seats, a longitudinal inclined block fixedly installed at the central position of the bottom of the bracket and longitudinally slidably installed inside the bracket, and a transverse inclined block slidably installed transversely inside the bracket and used for driving the longitudinal inclined block, a first connecting rod slidably installed between the two fixed seats and used for driving the two transverse inclined blocks to move synchronously, a second air cylinder installed at the front end of the fixed seat, and the output end of the second air cylinder is connected to the first connecting rod.

[0011] Preferably, a workbench is arranged below the base, a detection conveyor belt for conveying the engine cylinder head is installed on the top of the workbench, and a feeding conveyor belt and a discharging conveyor belt for conveying the engine cylinder head are respectively arranged on the left and right sides of the workbench.

[0012] Preferably, a vertical frame is fixedly installed at the rear end of the top of the base, and a three-axis linear guide rail is installed on the vertical frame, and a dial indicator for detecting the engine cylinder head is arranged on the three-axis linear guide rail.

[0013] Preferably, the lifting mechanism further includes:

[0014] Guide rods fixedly installed on both sides of the bottom of the bracket and used for guiding the lifting of the bracket.

[0015] Preferably, the lifting mechanism further includes:

[0016] A groove opened at the middle position of the lower end of the longitudinal inclined block and used for avoiding interference between the first connecting rod and the longitudinal inclined block when the first connecting rod moves.

[0017] Beneficial effects

[0018] The utility model provides a jig for machining an engine cylinder head. Compared with the prior art, the following beneficial effects are achieved:

[0019] (1) The engine cylinder head is transported to the inspection conveyor through the feeding conveyor, and the engine cylinder head is fixed and raised by the feeding conveyor, and then the micrometer is driven by the three-axis linear guide to inspect the fixed engine cylinder head. After the inspection is completed, the engine cylinder head is lowered to the inspection conveyor and released. The engine cylinder head is then transported to the discharging conveyor through the inspection conveyor and then transported to the next process. The engine cylinder body can be directly inspected on the production line during the transportation process, avoiding the need to remove the engine cylinder head from the conveyor separately for inspection, thereby improving production efficiency.

[0020] (2) When the engine cylinder head is being inspected, the lifting mechanism is used to lift it off the inspection conveyor belt to avoid placing the engine cylinder head directly on the inspection conveyor belt during inspection, which may cause unstable placement. In addition, since the engine cylinder head is fixed by the positioning mechanism before being lifted, it is also avoided that it shakes during the inspection process after being lifted, which may affect the inspection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure above the workbench in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the positioning mechanism in the utility model;

[0024] Figure 4 This is a schematic diagram of the structure inside the lifting mechanism of the utility model;

[0025] In the figure: 1. base; 2. lifting mechanism; 21. fixed seat; 22. bracket; 23. longitudinal oblique block; 24. transverse oblique block; 25. first connecting rod; 26. guide rod; 27. groove; 3. positioning mechanism; 31. fixing assembly; 311. frame; 312. slide rod; 313. positioning head; 32. driving assembly; 321. double-sided oblique block; 322. second connecting rod; 323. first cylinder; 4. workbench; 5. micrometer; 6. feed conveyor belt; 7. discharge conveyor belt; 8. detection conveyor belt; 9. stand; 10. three-axis linear guide; 11. second cylinder. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Please refer to Figures 1-4 , the present utility model provides a fixture technical solution for machining engine cylinder heads: A fixture for machining engine cylinder heads includes a base 1, a micrometer 5, a vertical frame 9, and a three-axis linear guide rail 10. Lifting mechanisms 2 for lifting during the inspection of the engine cylinder head are provided at both the front and rear ends of the base 1. A positioning mechanism 3 for positioning during the inspection of the engine cylinder head is provided on the lifting mechanism 2. The positioning mechanism 3 includes:

[0028] A fixing component 31, a frame body 311 provided at the top of the lifting mechanism 2, sliding rods 312 slidably installed on both sides inside the frame body 311, and positioning heads 313 fixedly installed at the ends of the sliding rods 312 for fixing the engine cylinder head;

[0029] A driving component 32, a double-sided inclined block 321 provided inside the sliding rod 312 of the frame body for driving the sliding rod 312, a second connecting rod 322 provided inside the frame body 311 for synchronously driving the two double-sided inclined blocks 321 on both sides, and a first cylinder 323 installed at one end of the frame body 311 for driving the second connecting rod 322;

[0030] In this implementation, the output end of the first cylinder 323 drives the second connecting rod 322 to drive the double-sided inclined block 321. The double-sided inclined block 321 drives the sliding rod 312 to slide along the inside of the frame body 311. At the same time, the sliding rod 312 drives the positioning head 313 to move horizontally. By moving the two positioning heads 313 on both sides towards the engine cylinder head at the same time, the engine cylinder head can be held and fixed by the two positioning heads 313 on both sides, avoiding shaking and causing errors during subsequent inspections.

[0031] Specifically, the lifting mechanism 2 includes:

[0032] Fixed seats 21 fixed at both the front and rear ends of the base 1, with a bracket 22 provided above the fixed seats 21. A longitudinal inclined block 23 fixedly installed at the central position of the bottom of the bracket 22 and longitudinally slidably installed inside the bracket 22. A transverse inclined block 24 for driving the longitudinal inclined block 23 is slidably installed horizontally inside the bracket 22. A first connecting rod 25 for driving the two transverse inclined blocks 24 to move synchronously is slidably installed between the two fixed seats 21. A second cylinder 11 is installed at the front end of the fixed seat 21, and the output end of the second cylinder 11 is connected to the first connecting rod 25. Guide rods 26 fixedly installed on both sides of the bottom of the bracket 22 for guiding the lifting of the bracket 22;

[0033] In this embodiment, after the engine cylinder head is fixed by the positioning mechanisms 3 on both sides, the first connecting rod 25 is driven by the output end of the second cylinder 11 to drive the transverse inclined block 24 to slide laterally along the inside of the fixed seat 21. At the same time, the transverse inclined block 24 pushes the longitudinal inclined block 23 and drives the bracket 22 to rise and fall with the cooperation of the guide rod 26, so that the engine cylinder head fixed by the positioning mechanism 3 on the bracket 22 can be raised and lowered slightly, so that the engine cylinder head is lifted upward and separated from the detection conveyor belt 8 during detection, thereby avoiding the engine cylinder head being directly placed on the detection conveyor belt 8 during detection, which is easy to cause shaking and affect the detection accuracy.

[0034] Specifically, a workbench 4 is provided below the base 1, a detection conveyor belt 8 for conveying the engine cylinder head is installed on the top of the workbench 4, a feed conveyor belt 6 and a discharge conveyor belt 7 for conveying the engine cylinder head are respectively provided on the left and right sides of the workbench 4, a stand 9 is fixedly installed at the top rear end of the base 1, and a three-axis linear guide 10 is installed on the stand 9, and a micrometer 5 for detecting the engine cylinder head is provided on the three-axis linear guide 10;

[0035] In this embodiment, the engine cylinder head is transported to the inspection conveyor 8 via the feed conveyor 6, and the engine cylinder head is fixed and lifted by 2 and 3, and then the micrometer 5 is driven by the three-axis linear guide 10 to inspect the fixed engine cylinder head. After the inspection is completed, the engine cylinder head is lowered to the inspection conveyor 8 and released, and then the engine cylinder head is transported to the discharge conveyor 7 via the inspection conveyor 8 and then transported to the next process.

[0036] Specifically, the lifting mechanism 2 also includes:

[0037] A groove 27 is provided at the middle position of the lower end of the longitudinal inclined block 23 and is used to prevent the first connecting rod 25 from interfering with the longitudinal inclined block 23 when moving;

[0038] In this embodiment, the longitudinal inclined block 23 can avoid motion interference with the first connecting rod 25 during the lifting process through the groove 27.

[0039] The working principle and use process of the utility model are as follows: first, the engine cylinder head is transported to the detection conveyor belt 8 through the feeding conveyor belt 6, and then the second connecting rod 322 is driven by the output end of the first cylinder 323 to drive the double-sided inclined block 321, and the double-sided inclined block 321 drives the sliding rod 312 to slide along the inside of the frame 311, and at the same time, the sliding rod 312 drives the positioning head 313 to move horizontally, and the positioning heads 313 on both sides move toward the engine cylinder head at the same time, so that the engine cylinder head can be dragged and fixed by the two positioning heads 313 on both sides, so as to avoid shaking and causing errors in subsequent detection; then, the first connecting rod 25 is driven by the output end of the second cylinder 11 to drive the transverse inclined block 24 along the fixing seat 21 , and the horizontal inclined block 24 pushes the longitudinal inclined block 23 and drives the bracket 22 to rise and fall with the cooperation of the guide rod 26, so that the engine cylinder head fixed by the positioning mechanism 3 on the bracket 22 can be lifted and lowered slightly, so that the engine cylinder head is lifted up and separated from the detection conveyor belt 8 during detection, so as to avoid the engine cylinder head being directly placed on the detection conveyor belt 8 during detection, which is easy to cause shaking and affect the detection accuracy; finally, the micrometer 5 is driven by the three-axis linear guide 10 to detect the fixed engine cylinder head. After the detection is completed, the engine cylinder head is lowered onto the detection conveyor belt 8 and released, and then the engine cylinder head is transported to the discharge conveyor belt 7 through the detection conveyor belt 8 and then transported to the next process.

[0040] The model of the cylinder is: CDA2B / CA2, the model of the three-axis linear guide is: LW-DG23-112, and the model of the micrometer is: 2046AB. In order to adopt existing mature technology products, they will not be elaborated in detail here, and the electrical components appearing in this article are all connected to the external main controller and 220V AC power.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A checking fixture for machining an engine cylinder head, comprising a base (1), a dial gauge (5), a stand (9) and a three-axis linear guide (10), characterized in that: A lifting mechanism (2) for lifting the engine cylinder head during inspection is disposed at the front and rear ends of the base (1); a positioning mechanism (3) for positioning the engine cylinder head during inspection is disposed on the lifting mechanism (2); the positioning mechanism (3) comprises: A fixing assembly (31), a frame (311) arranged on the top of the lifting mechanism (2), sliding rods (312) slidably installed on both sides of the frame (311), and a positioning head (313) fixedly installed at the end of the sliding rod (312) and used to fix the engine cylinder head; A driving assembly (32), a double-sided inclined block (321) arranged inside the frame slide bar (312) and used to drive the slide bar (312), a second connecting rod (322) arranged inside the frame (311) and used to synchronously drive the double-sided inclined blocks (321) on both sides, and a first cylinder (323) installed at one end of the frame (311) and used to drive the second connecting rod (322).

2. The inspection tool for machining an engine cylinder head according to claim 1, characterized in that: The lifting mechanism (2) comprises: A fixing seat (21) is fixed at the front and rear ends of the base (1), and a bracket (22) is arranged above the fixing seat (21), a longitudinal inclined block (23) is fixedly installed at the central position of the bottom of the bracket (22) and is longitudinally slidably installed inside the bracket (22), and a transverse inclined block (24) for driving the longitudinal inclined block (23) is transversely slidably installed inside the bracket (22), a first connecting rod (25) for driving the two transverse inclined blocks (24) to move synchronously is slidably installed between the two fixing seats (21), and a second cylinder (11) is installed at the front end of the fixing seat (21), and the output end of the second cylinder (11) is connected to the first connecting rod (25).

3. The inspection tool for machining an engine cylinder head according to claim 1, characterized in that: A workbench (4) is arranged below the base (1), a detection conveyor belt (8) for conveying the engine cylinder head is installed on the top of the workbench (4), and a feeding conveyor belt (6) and a discharging conveyor belt (7) for conveying the engine cylinder head are respectively arranged on the left and right sides of the workbench (4).

4. The inspection tool for machining an engine cylinder head according to claim 1, characterized in that: The stand (9) is fixedly mounted on the top rear end of the base (1), and a three-axis linear guide rail (10) is mounted on the stand (9). A micrometer (5) for detecting an engine cylinder head is provided on the three-axis linear guide rail (10).

5. The inspection tool for machining an engine cylinder head according to claim 2, characterized in that: The lifting mechanism (2) further comprises: Guide rods (26) are fixedly mounted on both sides of the bottom of the bracket (22) and are used to guide the lifting and lowering of the bracket (22).

6. The inspection tool for machining an engine cylinder head according to claim 2, characterized in that: The lifting mechanism (2) further comprises: A groove (27) is provided at the middle position of the lower end of the longitudinal inclined block (23) and is used to prevent the first connecting rod (25) from interfering with the longitudinal inclined block (23) when the first connecting rod (25) moves.

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